Calculate the grades of a class of students, given raw scores on exam
do.grades(ggrades, divs = NULL, cut = 0, tit = "Exam Grades",
breaks=length(ggrades)/3, ...)grades=ggrades, lett=letts, scor=scores, divs=divs, LETS=LETS, SCRS=SCRS, hist=HA LIST:
raw scores
letter grades
scaled grades
divisions, estimated by user or provided as input
letter grades assigned
Scores related to LETS
histogram structure
Raw grades
divisions for grades (optional)
low end Cut off to remove 0 from statistics
Title for Figure
breaks for the histogram, default=length(ggrades)/3
other parameters for hist
Jonathan M. Lees<jonathan.lees@unc.edu>
To remove students who do not take the test a low end cut off is used to excise any grades below that level. Both mean, and standard deviations are shown as well as median and quartiles.
jist, DUMPgrades, getlet